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Modules

Higher Education

Poliovirus

OverviewPoliovirus is a human retrovirus which is responsible for polio or poliomyelitis. It is mainly comprised of the RNA genome and protein capsid.Learning ObjectivesAfter...

Higher Education

Excretory System

OverviewThe excretory system consists of kidneys, ureter, urethra and urinary bladder. It helps the body in filtration and excretion of metabolic waste and unwanted...

Higher Education

Waves in Matter

OverviewWater waves and sound waves require matter or a medium to move from place to place. In context with matter, waves travel fastest in solids and slowest in...

Higher Education

Waves and Particles

OverviewAn electromagnetic wave can behave as a particle called a photon. A photon is a massless bundle of energy that behaves like a particle and a wave. The photon's...

Higher Education

Polarization of Light

OverviewPolarization of light is the phenomenon in which the vibrations of light are restricted in a direction perpendicular to the direction of the propagation...

Higher Education

Cardiac Cycle

OverviewThe cardiac cycle is the sequence of events that take place when the heart beats. A single cycle can be divided into two phases, systole and diastole. Learning...

Higher Education

Parts of Digestive System

OverviewThe digestive system is one of the major organ systems in our body. Its main parts are mouth, esophagus, stomach, liver, gallbladder, small intestine, large...

Higher Education

Synapse

OverviewA synapse is a structure that allows a neuron to pass a chemical signal to another neuron. A synapse constitutes the membranes of a presynaptic neuron and...

Higher Education

Ultrasound-SONAR

OverviewSONAR (SOund NAvigation Ranging) is a device which is used to detect and locate underwater objects by using ultrasonic waves. It consists of a transmitter...

Higher Education

Action Potential

OverviewAn action potential is the difference in electrical potential related to the movement of an impulse along the membrane of a muscle cell or a nerve cell....

Higher Education

Dispersion

OverviewDispersion refers to the splitting of white light into its constituent colors. When white light enters a prism, each color of light is bent by a different...

Higher Education

Laser

OverviewA ruby laser is a solid-state laser that uses the synthetic ruby crystal as its laser medium. It emits a narrow, intense beam of light in a single direction.Learning...

Higher Education

Meiosis I

OverviewMeiosis 1 is the first of the two consecutive divisions of the nucleus of the eukaryotic cell during meiosis, and is comprised of the following four stages:...

Higher Education

Structure of DNA

OverviewDNA is a macromolecule which carries genetic information from one generation to another generation. Its basic structural units are nucleotides. Each nucleotide...

Higher Education

Electric Generator

OverviewAn electric generator converts mechanical energy into electric energy. It consists of four parts: armature, permanent magnet, slip rings and brushes. When...

Higher Education

Regression and Correlation

OverviewRegression analysis involves identifying the relationship between a dependent variable and one or more independent variables. A model of this relationship...

Overview We are already familiar with the method of solving system of equations in two variables. But what if we have system of equations with three variables. In...

Higher Education

Waiting Time Distribution

OverviewTo explain the concept of waiting time distribution, we use lambda where Lambda is the number of events per unit time. A graph of exponential distribution,...

Higher Education

Normal Distribution

OverviewNormal (or Gaussian) distribution is a very common continuous probability distribution. Normal distributions are important in statistics and are often used...

OverviewThe respiratory system includes nose, pharynx, larynx, trachea, and lungs. It provides oxygen to body tissues for cellular respiration and removes waste...